Dust removal device for laser cutting machine

Abstract

The application relates to the technical field of laser cutting machines, and discloses a laser cutting machine dust removal device, which comprises a laser cutting machine, a laser cutting head installed on the laser cutting machine, a sliding table arranged on one side of the laser cutting machine, a traction frame installed on the laser cutting machine, a dust removal box body arranged on the sliding table and configured to move along the Y-axis direction along with the laser cutting head, a dust removal pipe installed on the front side of the laser cutting head, a butt joint frame arranged in the dust removal box body, a rotary sealing joint connected with an air outlet of a filter cartridge and installed at the bottom of the butt joint frame, a semicircular opening arranged on the surface of the butt joint frame, and a cleaning unit, which is composed of two groups and is reciprocatingly installed in the dust removal box body, each group of the cleaning unit being integrated with a cleaning part, a drying part, a spraying part and a rotatable blocking piece. The application can realize continuous filtration and self-cleaning of the filter cartridge without stopping the laser cutting machine, and significantly improves the cleaning effect of the filter cartridge.

Description

Technical Field

[0001] This invention relates to the field of laser cutting machine technology, specifically to a dust removal device for laser cutting machines. Background Technology

[0002] Laser cutting is a processing method that uses a high-energy-density laser beam to irradiate the surface of a workpiece, causing the material to locally melt or vaporize. The molten material is then blown away with the help of an auxiliary gas, thus achieving material separation. This technology offers advantages such as high cutting precision, a small heat-affected zone, high processing speed, and non-contact processing, and has been widely used in sheet metal processing, automotive manufacturing, aerospace, and electronics industries.

[0003] Laser cutting generates a large amount of fumes and dust. These fumes and dust consist mainly of two parts: first, tiny particles formed when molten metal is blown away by assist gas during cutting; and second, ultrafine dust formed by the condensation of material after instantaneous vaporization. If this dust is not effectively collected and treated, it will not only pollute the production environment and harm the respiratory health of operators, but also adhere to the surfaces of precision components such as optical lenses and guide rails, leading to decreased lens transmittance, accelerated wear of moving parts, and ultimately affecting cutting accuracy and equipment lifespan.

[0004] To address these issues, existing laser cutting machines are typically equipped with dust removal devices. These devices use a dust extraction hood to draw in the fumes and dust generated in the cutting area, which are then filtered through a filter cartridge before being discharged as clean air. However, as the core filtration element of the dust removal device, the filter cartridge accumulates a large amount of dust on its inner wall after prolonged use. This leads to increased filtration resistance, decreased dust removal efficiency, and in severe cases, even filter cartridge blockage, affecting the normal operation of the cutting process.

[0005] To address the dust removal issue of filter cartridges, existing technologies primarily employ two methods: The first is offline disassembly and cleaning. Operators remove the filter cartridges from the dust collector and manually clean them using a high-pressure water gun or immersion cleaning. The cartridges are then reinstalled after drying. The advantage of this method is its excellent cleaning effect, effectively removing stubborn dust adhering to the filter cartridge surface. However, its disadvantages include the need for manual intervention, cumbersome operation, and the requirement to shut down the equipment, leading to reduced production efficiency. Furthermore, frequent disassembly and reassembly of the filter cartridges can damage the sealing structure, increasing maintenance costs. The second method is online back-flushing cleaning. This method uses a solenoid valve to control compressed air pulses directed into the filter cartridge, utilizing the high-pressure airflow to peel away the deposited dust from the filter cartridge surface. Products such as the NIP series high-flow intelligent dust collector employ a reverse pulse cleaning mode, automatically back-flushing the filter cartridges for cleaning when the equipment is idle. The advantages of this method are that it eliminates the need to disassemble the filter cartridges, achieves automatic cleaning, and minimizes downtime. However, its disadvantages include limited cleaning effectiveness, difficulty in completely removing highly adhesive or small-particle dust, and the gradual clogging of the filter cartridges after prolonged use.

[0006] Therefore, achieving online continuous filtration and self-cleaning functions for filter cartridges has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a dust removal device for laser cutting machines, which can achieve continuous filtration of the filter cartridge without stopping the laser cutting machine, and can also self-clean the filter cartridge, thereby improving the cleaning effect of the filter cartridge.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a dust removal device for a laser cutting machine, comprising a laser cutting machine, a movable frame mounted on the laser cutting machine and moving in the Y-axis direction, and an X-axis movable frame mounted on the movable frame, a Z-axis movable frame mounted on the X-axis movable frame, and a laser cutting head mounted on the Z-axis movable frame, wherein a drag chain is mounted on the X-axis movable frame. The structures involved above are all consistent with the structures in existing laser cutting machines, and therefore will not be described in detail. In order to coordinate with the movement of the laser cutting head through the moving frame and drive the movement of the dust collection box, so that the dust collection box moves synchronously with the Y-axis, the following components are included: a sliding table, which is set on one side of the laser cutting machine; a traction frame, which is installed on the laser cutting machine; a dust collection box, which is set on the sliding table and configured to follow the laser cutting head along the Y-axis; and a dust collection pipe is installed on the front side of the laser cutting head. The docking frame is installed inside the dust collection box. A rotary sealing joint that connects to the air outlet of the filter cartridge is installed at its bottom. A semi-circular opening is provided on the surface of the docking frame. The cleaning unit consists of two sets, which are reciprocally movable and installed inside the dust collection box. Each cleaning unit integrates a sweeping section, a drying section, a spraying section, and a rotatable blocking component. The push structure is symmetrically installed inside the dust collection box, and its output end is connected to the cleaning unit to drive the cleaning unit closer to or away from the docking frame. The rotary drive unit is installed inside the dust collector box, and its output end is connected to the pulley at the lower end of the rotary sealing joint for driving the filter cartridge to rotate. Among them, the push structure drives the cleaning unit to move to fit against the surface of the docking frame and form a sealed chamber to accommodate the filter cartridge; The dust collection component is installed on the dust collection box, with its air intake connected to the dust collection pipe and its air outlet connected to the sealed chamber. When the structure-driven cleaning unit is pushed away from the docking frame, the blocking component rotates, and the rotation drive component drives the filter cartridge to rotate, so that the filter cartridge is cleaned in sequence through the cleaning section, drying section and spraying section.

[0009] Furthermore, through the above technical solution, the dust collection assembly includes an exhaust fan installed on the upper surface of the dust collection box, an air outlet connected to Y-shaped pipe one, an air intake connected to the dust collection pipe fitting, and a solenoid valve one and a solenoid valve two respectively installed on the branches of Y-shaped pipe one, which are respectively connected to the sealed chambers on the corresponding sides.

[0010] Furthermore, the drying section is detachably connected to the cleaning section and the spraying section via bolts; The spray unit includes a spray frame installed inside the dust collection box. An inclined plate is vertically installed inside the spray frame. Flat nozzles are symmetrically arranged on the surface of the inclined plate. A diverter nozzle is installed on the right side of the spray frame and connected to the flat nozzles through a water pipe. The cleaning unit includes a cleaning frame installed inside the dust collection box. The upper end of the cleaning frame has a recessed space facing downwards. A second stepper motor is installed in the recessed space. A bearing seat is provided at the bottom of the inner side of the cleaning frame. The output end of the second stepper motor is connected to the rotating shaft. The lower end of the rotating shaft is connected to the inner ring of the bearing seat. A flexible cleaning brush is installed on the surface of the rotating shaft. The drying section includes a drying frame connected to the cleaning frame and the spray frame by bolts. Hot air blowers are installed at equal intervals on the right side of the drying frame. Connecting shafts connected to the push structure are fixedly installed on the upper and lower ends of the drying frame.

[0011] As a preferred technical solution, the inclined plate has an inclination angle of 150°, which divides the inclined plate into two surfaces, and the flat nozzles are respectively installed on the corresponding surfaces, so that the left and right adjacent flat nozzles form an included angle. The inner side of the drying frame is also symmetrically equipped with inclined guide plates, which guide the hot air from the hot air blower toward the central area.

[0012] Furthermore, the blocking component includes an inner frame installed inside the spray frame, and protrusions provided on the bottom and top surfaces of the cleaning frame, drying frame, and spray frame. The upper and lower end surfaces of the blocking plate are provided with grooves matching the size of the protrusions. The blocking plate moves along the annular path of the protrusions. The outer surface of the blocking plate is provided with teeth. A stepper motor is installed inside the inner frame, and a gear is installed at the output end, which forms a transmission with the teeth on the outer surface of the blocking plate.

[0013] As a preferred technical solution, the drainage plate has an opening on the toothed side of the surface of the baffle plate to facilitate the passage of the teeth.

[0014] Furthermore, the rotary drive component includes motor mounting brackets symmetrically installed inside the dust collector housing. A stepper motor is mounted on the lower end face of the motor mounting bracket, and a pulley is connected to the output end of the stepper motor. The two sets of pulleys are connected by a transmission belt.

[0015] As a preferred technical solution, the dust collector is also equipped with a water storage structure, a water pumping structure, and a water distribution component. The water storage structure includes a mounting bracket installed on the inner side of the dust collector box, on which a water tank is mounted. Secondly, a baffle plate that holds the water tank is symmetrically arranged on the upper end of the mounting bracket. The water inlet of the water tank is located in the middle of the upper end of the water tank and extends through the dust collector box to the top of the dust collector box. A liquid level sensor is also installed on the water tank. The lower surface of the water tank is connected to the water pumping structure through a water pumping pipe. The pumping structure includes a pump installed on the inner side of the dust collector, with the pump inlet connected to the pumping pipe and the outlet connected to the water distribution assembly via a water supply pipe. The water distribution assembly includes a connecting pipe that connects to the water supply pipe. A Y-shaped pipe II is bolted to the connecting pipe, and a solenoid valve III and a solenoid valve IV are installed on the branches of the Y-shaped pipe II. A diversion box is installed at the upper end of each branch. Connectors are installed at equal intervals on one side of the diversion box and connected to the diversion nozzle through the water pipe II.

[0016] Furthermore, the dust collection box also includes a vertically installed side plate inside, dividing the dust collection box into left and right chambers. The water storage structure and the water pumping structure are installed in the left chamber, and the top plate and bottom plate are symmetrically installed in the right chamber. The top plate and bottom plate are divided into two chambers by a vertical plate, and two sets of cleaning units are located in the chamber. The bottom plate has symmetrical openings on its lower end. The pushing structure includes mounting plates installed on the lower end face of the base plate and the upper end face of the top plate. An electric push rod is installed on the inner side of the mounting plate, and the pushing end of the electric push rod is connected to a connecting shaft extending downward from the opening. Guide rails are symmetrically installed on the upper end face of the base plate and the lower end face of the top plate. Guide rails are connected to the upper and lower end faces of the corresponding cleaning frame and the upper and lower end faces of the spray frame. Support plates are symmetrically installed between the bottom of the inner side of the dust collector and the lower end of the base plate.

[0017] As a preferred technical solution, the dust removal pipe includes a dust suction hood located in front of the laser cutting head, the dust suction hood encloses the laser cutting head, the upper end of the dust suction hood is connected to a dust suction pipe, the other end of the dust suction pipe is connected to an air inlet pipe, and the air inlet pipe is connected to the air intake of the exhaust fan. The sliding table includes a water tank, a guide rail, and a moving plate. The water tank is located on the right side of the laser cutting machine. The guide rail is symmetrically installed on the upper surface of the water tank. The moving plate is installed on a slider on the surface of the guide rail. The dust removal box is installed on the upper surface of the moving plate.

[0018] Compared with existing technologies, this invention provides a dust removal device for laser cutting machines, which has the following beneficial effects: This invention, through a cleaning unit, a pushing structure, a docking frame, a dust collection assembly, and a rotary drive component, uses a pushing structure to bring the cleaning unit into contact with the docking frame, forming a circular, sealed space. The dust collection assembly draws outside air into this sealed space, where it is filtered through a filter cartridge. When the filter cartridge needs cleaning, solenoid valves one and two in the dust collection assembly open simultaneously, opening one path of the unused filter cartridge's solenoid valve and closing the other. This allows for cleaning path switching without stopping the machine, effectively cleaning the filter cartridge. When the filter cartridge is being cleaned, the pushing structure drives the cleaning unit to move in the opposite direction, and the blocking part opens, allowing the cleaning section, drying section, and spraying section in the cleaning unit to begin cleaning the surface of the filter cartridge. The cleaning method is as follows: the filter cartridge is rotated by the rotating drive (rotation speed is slow), the spraying section begins to spray the surface of the filter cartridge with a high-pressure spray to wash away the surface dust, then the cleaning section begins to clean the surface of the filter cartridge to thoroughly remove stubborn dust, and then the spraying section performs a washing operation on the surface of the filter cartridge. During the cleaning process, the wastewater containing dust will flow into the water tank through the opening on the surface of the docking frame and then through the opening located on the bottom plate.

[0019] As described above, this dust removal device integrates sweeping, drying, and spraying through a cleaning unit. Secondly, the air is filtered from the outside of the filter cartridge inwards to facilitate cleaning by the cleaning unit. Furthermore, through the action of the solenoid valve in the dust collection component, the purpose of cleaning can be achieved simply by rotating the filter cartridge without stopping the machine to change the filtration path. The cleaning unit also improves the cleaning effect on the filter cartridge. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the present invention; Figure 2 For the present invention Figure 1 A top-down view; Figure 3 This is a schematic diagram of the internal structure of the dust collector box on the right side of the present invention; Figure 4 For the present invention Figure 3 Bottom structure diagram; Figure 5 This is a schematic diagram of the structure at the upper part of the dust collector housing of the present invention; Figure 6 This is a schematic diagram of the water distribution component of the present invention; Figure 7 This is a schematic diagram showing the bonding of the docking frame and the cleaning unit of the present invention; Figure 8 For the present invention Figure 7 AA sectional view; Figure 9This is a schematic diagram of the rotating blocking plate of the present invention; Figure 10 For the present invention Figure 7 A top-down view; Figure 11 This is a schematic diagram showing the connection between the filter cartridge and the rotary sealing joint of the present invention; Figure 12 For the present invention Figure 11 BB cross-sectional diagram; Figure 13 For the purposes of this invention Figure 10 Schematic diagram of the installation position of the second stepper motor; Figure 14 For the present invention Figure 13 A magnified view of part A; Figure 15 This is a schematic diagram of the dust cover of the present invention.

[0021] In the diagram: 1. Laser cutting machine; 2. Moving frame; 3. Laser cutting head; 4. Dust hood; 5. Cable chain; 6. Dust suction pipe; 7. Traction frame; 8. Water tank; 9. Guide rail one; 10. Moving plate; 11. Dust collection box; 12. Air inlet pipe; 13. Exhaust fan; 14. Top plate; 15. Bottom plate; 16. Vertical plate; 17. Y-shaped pipe one; 18. Solenoid valve one; 19. Solenoid valve two; 20. Side plate; 21. Support plate; 22. Cleaning unit; 2201. Sweeping frame; 2202. Drying frame; 2203. Hot air blower; 2204. Sprayer rack; 2205. Drainage plate; 2206. Diverter nozzle; 2207. Water pipe one; 2208. Inclined plate; 2209. Flat nozzle; 2210. Inner frame; 2211. Stepper motor one; 2212. Baffle plate; 2213. Protrusion; 2214. Connecting shaft; 2215. Stepper motor two; 2216. Bearing seat; 2217. Rotating shaft; 23. Water distribution assembly; 231. Connecting pipe; 232. Y-type pipe II; 233. Solenoid valve III; 234. Solenoid valve IV; 235. Diverter box; 236. Water pipe II; 24. Mounting bracket; 25. Baffle plate; 26. Pump; 27. Water supply pipe; 28. Water tank; 29. ​​Liquid level sensor; 30. Mounting plate; 31. Electric push rod; 32. Motor mounting bracket; 33. Stepper motor three; 34. Connecting bracket; 35. Rotary sealing joint; 36. Filter cartridge; 37. Pulley; 38. Guide rail two. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example Please see Figure 1-15 The present invention provides the following technical solution: a dust removal device for a laser cutting machine, comprising a laser cutting machine 1 mounted on a moving frame 2 that moves along the Y-axis, an X-axis moving frame mounted on the moving frame, a Z-axis moving frame mounted on the X-axis moving frame, and a laser cutting head 3 mounted on the Z-axis moving frame, wherein a drag chain is mounted on the X-axis moving frame (the foregoing content is consistent with the structure of existing laser cutting machines, and the detailed connection forms and the interrelation forms between them can be implemented with reference to the prior art, so they will not be repeated in the technical description of this application).

[0024] like Figure 1-2 As shown, it also includes a sliding table set on one side of the laser cutting machine 1; a traction frame 7 installed on the right side of the moving frame 2; and a dust collection box 11, which is set on the sliding table and configured to follow the laser cutting head 3 to move along the Y-axis. When the moving frame 2 drives the laser cutting head 3 to move along the Y-axis, the dust collection box 11 located on the sliding table will be moved synchronously through the action of the traction frame 7.

[0025] like Figure 1-15 As shown, a dust removal pipe is installed on the front side of the laser cutting head 3; a docking frame 34 is set inside the dust removal box 11, and a rotary sealing joint 35 connected to the air outlet of the filter cartridge 36 is installed at its bottom. A semi-circular opening is opened on the surface of the docking frame 34; two cleaning units 22 are installed in the dust removal box 11 and can be moved back and forth. Each cleaning unit 22 integrates a cleaning section, a drying section, a spraying section, and a rotatable blocking component; a pushing structure is symmetrically installed inside the dust removal box 11, and its output end is connected to the cleaning unit 22 to drive the cleaning unit 22 to move closer to or away from the docking frame 34; a rotary drive component, Installed inside the dust collector housing 11, its output end is connected to the pulley 37 at the lower end of the rotary sealing joint 35 for driving the filter cartridge 36 to rotate; wherein, the pushing structure drives the cleaning unit 22 to move to fit against the surface of the docking frame 34 and form a sealed chamber to accommodate the filter cartridge 36; the dust collection assembly is installed on the dust collector housing 11, its air intake is connected to the dust collection pipe, and its air outlet is connected to the sealed chamber; when the pushing structure drives the cleaning unit 22 away from the docking frame 34, the blocking component rotates, and the rotating drive component drives the filter cartridge 36 to rotate, so that the filter cartridge 36 is cleaned in sequence through the cleaning section, the drying section and the spraying section.

[0026] Dust generated during the cutting process by the laser cutting head 3 is drawn into a sealed cavity formed by the dust collection assembly through the dust collection pipe. This cavity is created by the pushing structure driving the cleaning unit 22 into contact with the docking frame 34. The dust is then filtered by the filter cartridge 36 located on the rotary sealing joint 35. Before filtration, the dust collection assembly is activated, and external air simultaneously enters both sets of cleaning units. When cleaning one set of filter cartridges is required, the corresponding solenoid valve on that side is closed, allowing all airflow to pass through the other set of filter cartridges, thus achieving non-stop switching. The pushing structure then drives the cleaning unit 22 into contact with the docking frame 34 to form a sealed cavity, ensuring effective filtration. At this time, the rotatable blocking component... Figure 8 As shown, the sweeping, drying, and spraying sections of the cleaning unit are blocked to prevent dust from entering and accumulating inside. This cleaning unit integrates spraying, drying, and sweeping, greatly improving the space utilization of the device, making its structure more compact and simpler, and facilitating subsequent maintenance. When cleaning is required, the pushing mechanism will cause the cleaning unit 22 to move in the opposite direction toward the docking frame 34, and the blocking part will rotate to... Figure 8 As shown, the cleaning unit 22, including the cleaning section, drying section, and spraying section, is now visible. The filter cartridge 36 is slowly rotated counter-clockwise by a rotating drive. First, the spraying section begins a powerful spraying operation on the surface of the filter cartridge 36 to disperse the surface dust. Then, the cleaning section cleans the surface of the filter cartridge 36 to remove stubborn dust. The cleaning section rotates in the opposite direction to the filter cartridge 36, improving the cleaning effect. Next, the spraying section sprays the surface of the filter cartridge 36. After cleaning, the drying section dries the filter cartridge 36. During drying, the rotating drive increases the rotation speed of the filter cartridge 36, but not too quickly, to improve the drying efficiency and ensure rapid drying. After all procedures are completed, the pushing structure brings the cleaning unit 22 into contact with the docking frame 34, forming a sealed cavity for dust filtration.

[0027] Based on the above, in order to achieve truly non-stop switching of filtering paths, please refer to the following for details. Figure 3As shown, the dust collection assembly includes an exhaust fan 13 installed on the upper surface of the dust collection box 11. The exhaust port is connected to a Y-shaped tube 17, and the intake port is connected to a dust collection pipe. A solenoid valve 18 and a solenoid valve 2 19 are respectively installed on the branches of the Y-shaped tube 17. These branches are respectively connected to the sealed chambers on the corresponding sides. Assuming that the left side needs to be cleaned, the solenoid valve 2 19 is opened. At this time, both branches of the Y-shaped tube 17 will be fully opened and the solenoid valve 18 will be closed. This operation of the two solenoid valves takes very little time. During the switching, the dust collection assembly still remains in working condition, and the dust collection effect is not affected. It can be completed without the intervention of other structures.

[0028] Secondly, the cleaning unit 22, which integrates drying, spraying, and sweeping functions, can be found in the documentation. Figure 8-10 As shown, the drying section is detachably connected to the cleaning section and the spraying section by bolts; The spray unit includes a spray frame 2204 installed inside the dust collection box 11. An inclined plate 2208 is vertically installed inside the spray frame 2204. Flat nozzles 2209 are symmetrically arranged on the surface of the inclined plate 2208. A diverter nozzle 2206 is installed on the right side of the spray frame 2204 and is connected to the flat nozzles 2209 through a water pipe 2207. The cleaning unit includes a cleaning frame 2201 installed inside the dust collection box 11. The upper end of the cleaning frame 2201 has a recessed space facing downwards (see reference). Figure 10 and Figure 13 As shown), a stepper motor 2215 is installed in the recess, and a bearing seat 2216 is provided on the bottom inner side of the cleaning frame 2201. The output end of the stepper motor 2215 is connected to the rotating shaft 2217, and the lower end of the rotating shaft 2217 is connected to the inner ring of the bearing seat 2216. A flexible cleaning brush is installed on the surface of the rotating shaft 2217, and its cleaning radius can be found in [reference needed]. Figure 8 Figure 9 As shown ( Figure 9 The circled area 'a' in the middle represents the area that the flexible cleaning brush can clean. This area is sufficient to contact the surface of the filter cartridge 36 and clean the surface of the filter cartridge 36. The stepper motor 2215 drives the rotating shaft 2217 to rotate, so that the flexible cleaning brush can effectively clean the surface of the filter cartridge 36. To facilitate cleaning of the sweeping and spraying sections after subsequent use, the drying section can be disassembled. See details for further information. Figure 8 and Figure 9 As shown, the drying section includes a drying frame 2202 connected to the cleaning frame 2201 and the spray frame 2204 by bolts. Hot air blowers 2203 are installed at equal intervals on the right side of the drying frame 2202. Connecting shafts 2214 connected to the push structure are fixedly installed on the upper and lower ends of the drying frame 2202.

[0029] Based on the above, in order to improve the cleaning effect of the flat nozzle 2209 on the surface of the filter cartridge 36, please refer to the following for details. Figure 8 , Figure 9 As shown, the inclined plate 2208 has an inclination angle of 150°, which divides the inclined plate 2208 into two surfaces. The flat nozzles 2209 are respectively installed on the corresponding surfaces, so that the left and right adjacent flat nozzles 2209 form an included angle. Secondly, to prevent excessive water from splashing into the drying frame 2202 during the spraying operation, refer to... Figure 8 and Figure 9 As shown, the inner side of the drying frame 2202 is also symmetrically equipped with a guide plate 2205 with an inclined angle, which guides the hot air from the hot air blower 2203 to be concentrated and blown out towards the middle area, which is more conducive to the drying operation of the filter cartridge 36. Secondly, the guide plate 2205 can also prevent a large amount of dust clumps with water from being thrown into the drying frame 2202 when the flexible cleaning brush is rotating. Therefore, the guide plate 2205 can not only guide the airflow but also prevent a large amount of dust clumps and water from entering the drying frame 2202.

[0030] See Figure 7-9 As shown, the blocking component includes an inner frame 2210 installed inside the spray frame 2204, and protrusions 2213 provided on the bottom and top surfaces of the inner sides of the cleaning frame 2201, drying frame 2202, and spray frame 2204. The upper and lower end faces of the blocking plate 2212 are provided with grooves matching the size of the protrusions 2213. The blocking plate 2212 moves along the annular path of the protrusions 2213. The outer surface of the blocking plate 2212 is provided with teeth. A stepper motor 2211 is installed inside the inner frame 2210, and its output end is equipped with a gear that forms a transmission with the teeth on the outer surface of the blocking plate 2212. Through the transmission relationship formed by the gear at the output end of the stepper motor 2211 and the teeth on the surface of the blocking plate 2212, the stepper motor 2211 drives the blocking plate 2212 to move along the annular path of the protrusions 2213. (See reference...) Figure 9 As shown, the maximum rotation angle α of the baffle plate is 150°, which allows the baffle plate 2212 to expose the cleaning section, drying section and spraying section, making it convenient for cleaning the filter cartridge 36.

[0031] To facilitate the passage of the teeth on the surface of the baffle plate 2212 through the guide plate 2205, the guide plate 2205 has an opening on the side near the teeth on the surface of the baffle plate 2212 to facilitate the passage of the teeth.

[0032] See Figure 3 , Figure 11 , Figure 12As shown, the rotary drive includes a motor mounting bracket 32 ​​symmetrically installed inside the dust collection box 11. A stepper motor 33 is mounted on the lower end face of the motor mounting bracket 32. A pulley 37 is connected to the output end of the stepper motor 33. The two sets of pulleys 37 are connected by a transmission belt.

[0033] See Figure 3-6 As shown, the dust removal box 11 is also equipped with a water storage structure, a water pumping structure, and a water distribution component 23. See Figure 3 and Figure 4 As shown, the water storage structure includes a mounting bracket 24 installed on the inner side of the dust collector 11, a water tank 28 installed on the mounting bracket 24, and a baffle plate 25 that holds the water tank 28 symmetrically arranged on the upper end of the mounting bracket 24. The water inlet of the water tank 28 is located at the middle of the upper end of the water tank 28 and extends through the dust collector 11 to the top of the dust collector 11. A liquid level sensor 29 is also installed on the water tank 28. The lower surface of the water tank 28 is connected to the pumping structure through a pumping pipe. See Figure 3 and Figure 4 As shown, the water pumping structure includes a pump 26 installed on the inner side of the dust collector 11. The pump 26 has its water inlet connected to a water pumping pipe and its outlet connected to a water distribution assembly 23 via a water supply pipe 27. The pump pump draws water from the water tank 28 to the water distribution assembly 23 via the water pumping pipe. See Figure 3 , Figure 5 , Figure 6 As shown, the water distribution assembly 23 includes a connecting pipe 231 connected to the water supply pipe 27. A Y-shaped pipe 232 is bolted to the connecting pipe 231, and a solenoid valve 233 and a solenoid valve 234 are respectively installed on the branches of the Y-shaped pipe 232. A diversion box 235 is installed at the upper end of each branch. A connector is installed at equal intervals on one side of the diversion box 235 and connected to the diversion nozzle 2206 through a water pipe 236. The start and stop of the solenoid valve 233 or the solenoid valve 234 are controlled according to the start of the spray section on the corresponding side. As can be seen from the attached figure, the diameter of the water supply pipe 27 is much larger than the diameter of the Y-shaped pipe 232, so the water pressure in the Y-shaped pipe 232 is higher. At the same time, the diameter of the water pipe 2207 is smaller than the diameter of the water pipe 236. This step-by-step diameter reduction design can further increase the pressure inside the pipe, so that the water sprayed through the flat nozzle has a strong impact force.

[0034] See Figure 3 and Figure 4As shown, the dust collection box 11 also includes a side plate 20 installed vertically inside, dividing the dust collection box 11 into left and right chambers. The water storage structure and the water pumping structure are installed in the left chamber. The top plate 14 and the bottom plate 15 are symmetrically installed in the right chamber. The top plate 14 and the bottom plate 15 are divided into two chambers by a vertical plate 16, and two sets of cleaning units 22 are located in the chamber. The lower end of the bottom plate 15 has symmetrical openings. See Figure 3 and Figure 4 As shown, the pushing structure includes a mounting plate 30 installed on the lower end face of the base plate 15 and the upper end face of the top plate 14. An electric push rod 31 is installed on the inner side of the mounting plate 30. The pushing end of the electric push rod 31 is connected to the connecting shaft 2214 extending downward from the opening. The connection between the electric push rod 31 and the connecting shaft 2214 drives the overall movement of the cleaning unit 22, so that its baffle plate 2212 contacts the surface of the docking frame 34, forming a sealed chamber that is conducive to filtration. A rubber pad (not shown in the figure) is installed on the surface of the docking frame 34 in the contact area with the baffle plate 2212 to improve the sealing after contact. Secondly, the maximum stroke of the electric push rod 31 can bring the cleaning unit 22 into contact with the docking frame 34. After retraction, the shortest distance between the surface of the filter cartridge 36 and the baffle plate 2212 is 2cm. This leaves a cleaning distance and does not cause the baffle plate 2212 to collide with the surface of the filter cartridge 36 when it rotates. The upper end face of the base plate 15 and the lower end face of the top plate 14 are symmetrically equipped with guide rails 38 to facilitate the movement of the cleaning unit 22. The guide rails 38 are connected to the upper and lower end faces of the corresponding cleaning frame 2201 and the upper and lower end faces of the spray frame 2204. A support plate 21 is symmetrically installed between the bottom inner side of the dust collector 11 and the lower end face of the base plate 15 to support the base plate 15.

[0035] See Figure 1-2 , Figure 14 As shown, the dust removal fitting includes a dust suction hood 4 located in front of the laser cutting head 3. The dust suction hood 4 encloses the laser cutting head 3. The upper end of the dust suction hood 4 is connected to a dust suction pipe 6, and the other end of the dust suction pipe 6 is connected to an air inlet pipe 12. The air inlet pipe 12 is connected to the air intake of the blower 13. It should be noted that the dust suction pipe 6 is a flexible hose, so it can adapt to bending as the cable chain 5 bends. The dust suction hood 4 is bolted to the Z-axis moving frame. The lower end is the dust suction opening, and the inside is a cavity. The upper end is provided with a connecting pipe to the dust suction pipe 6. The dust suction pipe 6 and the connecting pipe are connected and fixed by a clamp structure. The sliding table includes a water tank 8, a guide rail 9, and a moving plate 10. The water tank 8 is located on the right side of the laser cutting machine 1. The guide rail 9 is symmetrically installed on the upper surface of the water tank 8. The moving plate 10 is installed on the slider on the surface of the guide rail 9. The dust removal box 11 is installed on the upper surface of the moving plate 10.

[0036] Working principle and workflow: The working process of this device will be described in detail below with reference to the accompanying drawings.

[0037] (a) Normal filtration state When the laser cutting machine is performing a cutting operation, this device is in normal filtering mode, and its working process is as follows: Step 1: Formation of a sealed chamber The electric push rod 31 drives the two sets of cleaning units 22 to move towards the docking frame 34 until the end face of the cleaning unit 22 (i.e., the baffle plate 2212) is in close contact with the surface of the docking frame 34. At this time, the stepper motor 2211 drives the baffle plate 2212 to rotate to the closed position (e.g., ...). Figure 8 As shown, the cleaning section, drying section, and spraying section are completely covered to prevent external dust from entering the cleaning unit and causing contamination. The baffle plate 2212 in the two sets of cleaning units 22 and the docking frame 34 together form a sealed filtration chamber that accommodates the filter cartridge 36.

[0038] Step 2: Connect the dust removal pipeline The exhaust fan 13 starts, drawing in dust-laden air generated in the cutting area of ​​the laser cutting head 3 through the dust hood 4, dust suction pipe 6, and air inlet pipe 12. The dust-laden air enters the Y-shaped pipe 17 via the exhaust fan 13, and then passes through solenoid valve 18 and solenoid valve 19 to enter the corresponding sealed chambers of the two cleaning units, where it is filtered by filter cartridge 36. Clean air passes through the filter cartridge 36 and is discharged through the rotary sealing joint 35.

[0039] (ii) Switching the filtering path (without stopping the system) Taking the need to clean the left filter cartridge as an example, this device achieves online switching of the filtration path through solenoid valve switching: Step 1: Switching the solenoid valve Solenoid valve 18 and solenoid valve 29 are opened simultaneously, and dust-laden air enters the two sets of sealed chambers respectively. The two sets of filter cartridges 36 work in parallel. Then, solenoid valve 18 is closed. At this time, all the dust-laden air is filtered through the filter cartridge 36 corresponding to the right cleaning unit, and the filter cartridge on the left stops filtering.

[0040] Step 2: Switch effects The entire switching process requires only the action of the solenoid valve, taking only a short time. During the switching period, the induced draft fan 13 remains operational, and the dust removal effect is unaffected. The switching method of this invention is faster and more reliable, truly achieving seamless switching and continuous filtration.

[0041] (III) Cleanliness of the filter cartridge Once the filtration path switching is complete, the left-side cleaning unit 22 enters the cleaning state, and its workflow is as follows: Step 1: Retract cleaning unit 22 The electric push rod 31 moves in the opposite direction, causing the cleaning unit 22 to move away from the docking frame 34, increasing the distance between the surface of the filter cartridge 36 and the baffle plate 2212 to 2cm, leaving space for cleaning operations.

[0042] Step 2: Open the blocking component Stepper motor 2211 drives the stop plate 2212 to rotate to the open position (e.g.) Figure 9 (As shown in another position), so that the cleaning section, drying section and spraying section integrated in the cleaning unit 22 are fully exposed, in preparation for cleaning the filter cartridge 36.

[0043] Step 3: Start the filter cartridge by rotating it. Stepper motor 33 starts, driving the rotary sealing joint 35 to rotate via pulley 37 and transmission belt, which in turn drives the filter cartridge 36 to rotate slowly at a set speed. The rotation direction of the filter cartridge is set to counterclockwise, opposite to the rotation direction of the cleaning part, in order to improve the cleaning effect.

[0044] Step 4: Spraying operation (first process) When the spray unit is activated, pump 26 draws water from tank 28 and delivers it through water pipe 27 and connecting pipe 231 into Y-shaped pipe 232. Solenoid valve 233 opens, and water flows through distribution box 235 and water pipe 236 to distribution nozzle 2206, and then through water pipe 2207 to flat nozzle 2209. Due to the step-by-step diameter reduction design, the water is sprayed at high pressure onto the surface of filter cartridge 36 at flat nozzle 2209.

[0045] High-pressure spraying can disperse the surface dust adhering to the filter cartridge and soften stubbornly stuck particles, creating favorable conditions for subsequent cleaning.

[0046] Step 5: Cleaning (Second step) After the spraying operation has been running for a period of time, the cleaning unit starts, and the stepper motor 2215 drives the rotating shaft 2217 to rotate, which in turn drives the flexible cleaning brush mounted on the surface of the rotating shaft 2217 to rotate, mechanically cleaning the surface of the filter cartridge 36. Since the rotation direction of the cleaning unit (clockwise) is opposite to the rotation direction of the filter cartridge 36 (counterclockwise), the cleaning brush and the surface of the filter cartridge form relative motion, which significantly enhances the removal effect on stubborn dust.

[0047] Step 6: Second spraying (third process) After cleaning is completed, the spray unit is restarted to spray the surface of filter cartridge 36 a second time. The main purpose of this spray is to wash away the residual dust removed by the cleaning unit and further clean the surface of the filter cartridge.

[0048] Step 7: Drying operation (fourth process) After cleaning, the drying unit is started, and the hot air blower 2203 generates hot air, which is guided by the guide plate 2205 and blown onto the surface of the filter cartridge 36. At this time, the stepper motor 33 can appropriately increase the rotation speed of the filter cartridge 36 (but still maintain a low speed) so that the surface of the filter cartridge is heated evenly, accelerates the evaporation of moisture, and achieves rapid drying. The guide plate 2205 not only plays a role in guiding the airflow, but also prevents dust particles with moisture from being thrown into the drying frame 2202 during the cleaning process.

[0049] Step 8: Cleaning effect After the complete cleaning process of the above four steps of "spray rinsing → mechanical cleaning → secondary spraying → hot air drying", the dust on the surface of the filter cartridge 36 is completely removed.

[0050] (iv) Wastewater diversion and collection Throughout the cleaning process, the dust-laden wastewater generated by the spraying flows down the outer surface of the filter cartridge 36, exits through the semi-circular opening on the surface of the docking frame 34, and then flows into the water tank 8 through the corresponding opening on the bottom plate 15. This directional flow design avoids wastewater residue inside the device and prevents secondary pollution.

[0051] (v) Restore filtration status After the filter cartridge has been cleaned and dried, the device returns to normal filtration status: Step 1: Stepper motor 2211 drives the baffle plate 2212 to rotate and close, thus blocking the cleaning section, drying section, and spraying section again; Step 2: The electric push rod 31 drives the cleaning unit 22 to move towards the docking frame 34, so that the baffle plate 2212 and the docking frame 34 are re-attached.

[0052] This completes the full cleaning cycle for the left filter cartridge. The two sets of filter cartridges can be cleaned alternately to ensure that at least one set of filter cartridges is in operation at any given time.

[0053] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dust removal device for a laser cutting machine, comprising a laser cutting machine (1) and a laser cutting head (3) mounted on the laser cutting machine (1), characterized in that, Also includes: A sliding table is set on one side of the laser cutting machine (1); a traction frame (7) is installed on the laser cutting machine (1); a dust removal box (11) is set on the sliding table and configured to follow the laser cutting head (3) to move along the Y-axis direction, and a dust removal pipe is installed on the front side of the laser cutting head (3); The docking frame (34) is installed inside the dust collection box (11), and a rotary sealing joint (35) connected to the air outlet of the filter cartridge (36) is installed at its bottom. A semi-circular opening is provided on the surface of the docking frame (34). The cleaning unit (22) consists of two sets, which are reciprocally installed in the dust collection box (11). Each cleaning unit (22) integrates a sweeping section, a drying section, a spraying section, and a rotatable blocking component. The push structure is symmetrically installed inside the dust collection box (11), and its output end is connected to the cleaning unit (22) to drive the cleaning unit (22) to move closer to or away from the docking frame (34). A rotary drive unit is installed inside the dust collector housing (11), and its output end is connected to the pulley (37) at the lower end of the rotary sealing joint (35) for driving the filter cartridge (36) to rotate. Among them, the push structure drives the cleaning unit (22) to move to fit against the surface of the docking frame (34) and enclose to form a sealed chamber to accommodate the filter cartridge (36); The dust collection assembly is installed on the dust collection box (11), with its air intake connected to the dust collection pipe and its air outlet connected to the sealed chamber. When the structure-driven cleaning unit (22) is pushed away from the docking frame (34), the blocking component rotates, and the rotation drive component drives the filter cartridge (36) to rotate, so that the filter cartridge (36) is cleaned in sequence through the cleaning section, the drying section and the spraying section.

2. The dust removal device for a laser cutting machine according to claim 1, characterized in that: The dust collection assembly includes an exhaust fan (13) installed on the upper surface of the dust collection box (11), an air outlet connected to Y-shaped pipe (17), an air intake connected to the dust collection pipe fitting, and a solenoid valve (18) and a solenoid valve (2) respectively installed on the branch of the Y-shaped pipe (17), which are respectively connected to the sealed chamber on the corresponding side.

3. The dust removal device for a laser cutting machine according to claim 1, characterized in that: The drying section is detachably connected to the cleaning section and the spraying section via bolts. The spray unit includes a spray frame (2204) installed inside the dust collection box (11). An inclined plate (2208) is vertically installed inside the spray frame (2204). Flat nozzles (2209) are symmetrically arranged on the surface of the inclined plate (2208). A diverter nozzle (2206) is installed on the right side of the spray frame (2204) and is connected to the flat nozzles (2209) through a water pipe (2207). The cleaning unit includes a cleaning frame (2201) installed in the dust collection box (11). The upper end of the cleaning frame (2201) has a recessed space facing downwards. A stepper motor (2215) is installed in the recessed space. A bearing seat (2216) is provided at the bottom inner side of the cleaning frame (2201). The output end of the stepper motor (2215) is connected to the rotating shaft (2217). The lower end of the rotating shaft (2217) is connected to the inner ring of the bearing seat (2216). A flexible cleaning brush is installed on the surface of the rotating shaft (2217). The drying section includes a drying frame (2202) connected to a cleaning frame (2201) and a spray frame (2204) by bolts. Hot air blowers (2203) are installed at equal intervals on the right side of the drying frame (2202). Connecting shafts (2214) connected to the push structure are fixedly installed on the upper and lower ends of the drying frame (2202).

4. The dust removal device for a laser cutting machine according to claim 3, characterized in that: The inclined plate (2208) has an inclination angle of 150°, which divides the inclined plate (2208) into two surfaces. The flat nozzles (2209) are respectively installed on the corresponding surfaces, so that the left and right adjacent flat nozzles (2209) form an included angle. The drying frame (2202) is also symmetrically equipped with a diversion plate (2205) with an inclined angle, which guides the hot air from the hot air blower (2203) to be concentrated and blown out towards the middle area.

5. The dust removal device for a laser cutting machine according to claim 3, characterized in that: The blocking component includes an inner frame (2210) installed inside the spray frame (2204), and protrusions (2213) provided on the bottom and top surfaces of the cleaning frame (2201), drying frame (2202), and spray frame (2204). The upper and lower end surfaces of the blocking plate (2212) are provided with grooves matching the size of the protrusions (2213). The blocking plate (2212) moves along the annular path of the protrusions (2213). The outer surface of the blocking plate (2212) is provided with teeth. A stepper motor (2211) is installed inside the inner frame (2210), and a gear is installed at the output end, which forms a transmission with the teeth on the outer surface of the blocking plate (2212).

6. The dust removal device for a laser cutting machine according to claim 4, characterized in that: The diversion plate (2205) has an opening on the toothed side of the surface of the baffle plate (2212) to facilitate the passage of the teeth.

7. The dust removal device for a laser cutting machine according to claim 1, characterized in that: The rotary drive includes a motor mounting bracket (32) symmetrically installed in the dust collector (11). A stepper motor (33) is mounted on the lower end face of the motor mounting bracket (32). A pulley (37) is connected to the output end of the stepper motor (33). The two sets of pulleys (37) are connected by a transmission belt.

8. The dust removal device for a laser cutting machine according to claim 3, characterized in that: The dust removal box (11) is also equipped with a water storage structure, a water pumping structure, and a water distribution component (23). The water storage structure includes a mounting bracket (24) installed on the inner side of the dust collector box (11), a water tank (28) is installed on the mounting bracket (24), and a baffle plate (25) that holds the water tank (28) is symmetrically arranged on the upper end of the mounting bracket (24). The water inlet of the water tank (28) is located at the middle of the upper end of the water tank (28) and extends through the dust collector box (11) to the top of the dust collector box (11). A liquid level sensor (29) is also installed on the water tank (28). The lower surface of the water tank (28) is connected to the pumping structure through a pumping pipe. The pumping structure includes a pump (26) installed on the inner side of the dust collector (11). The pump (26) has its pump inlet connected to a pumping pipe and its outlet connected to a water distribution assembly (23) via a water supply pipe (27). The water distribution assembly (23) includes a connecting pipe (231) connected to the water supply pipe (27). A Y-shaped pipe (232) is bolted to the connecting pipe (231). A solenoid valve (233) and a solenoid valve (234) are installed on the branches of the Y-shaped pipe (232). A diversion box (235) is installed at the upper end of each branch. A connector is installed at equal intervals on one side of the diversion box (235) and connected to the diversion nozzle (2206) through the water pipe (236).

9. The dust removal device for a laser cutting machine according to claim 1, characterized in that: The dust collector (11) also includes a side plate (20) installed vertically inside, which divides the dust collector (11) into two chambers, left and right. The water storage structure and the water pumping structure are installed in the left chamber, and the top plate (14) and the bottom plate (15) are symmetrically installed in the right chamber. The top plate (14) and the bottom plate (15) are divided into two chambers by a vertical plate (16), and two sets of cleaning units (22) are located in the chamber. The bottom plate (15) has symmetrical openings at its lower end. The pushing structure includes a mounting plate (30) installed on the lower end face of the base plate (15) and the upper end face of the top plate (14). An electric push rod (31) is installed on the inner side of the mounting plate (30). The pushing end of the electric push rod (31) is connected to a connecting shaft (2214) extending downward from the opening. Guide rails 2 (38) are symmetrically installed on the upper end face of the base plate (15) and the lower end face of the top plate (14). The guide rails 2 (38) are connected to the upper and lower end faces of the corresponding cleaning frame (2201) and the upper and lower end faces of the spray frame (2204). A support plate (21) is symmetrically installed between the bottom of the inner side of the dust collector (11) and the lower end face of the bottom plate (15).

10. The dust removal device for a laser cutting machine according to claim 1, characterized in that: The dust removal pipe includes a dust suction hood (4) located in front of the laser cutting head (3), the dust suction hood (4) encloses the laser cutting head (3), the upper end of the dust suction hood (4) is connected to a dust suction pipe (6), the other end of the dust suction pipe (6) is connected to an air inlet pipe (12), and the air inlet pipe (12) is connected to the air intake of the blower (13). The sliding table includes a water tank (8), a guide rail (9), and a moving plate (10). The water tank (8) is located on the right side of the laser cutting machine (1). The guide rail (9) is symmetrically installed on the upper surface of the water tank (8). The moving plate (10) is installed on the slider on the surface of the guide rail (9). The dust removal box (11) is installed on the upper surface of the moving plate (10).

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